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Finding the Fourth Proportional to 274,469.08, 411,645.90 and 77,431

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Solution

The fourth proportional to 274,469.08, 411,645.90 and 77,431 is: 116,130.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,469.08 : 411,645.90 = 77,431 : x
  2. Step 2: Convert to fraction form
    274,469.08/411,645.90 = 77,431/x
  3. Step 3: Cross multiply
    274,469.08x = 411,645.90 × 77,431
  4. Step 4: Simplify right side
    274,469.08x = 31,874,153,682.90
  5. Step 5: Solve for x
    x = 31,874,153,682.90/274,469.08
  6. Step 6: Final answer
    x = 116,130.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.